JPS6025037A - 磁気記録再生装置 - Google Patents

磁気記録再生装置

Info

Publication number
JPS6025037A
JPS6025037A JP13249383A JP13249383A JPS6025037A JP S6025037 A JPS6025037 A JP S6025037A JP 13249383 A JP13249383 A JP 13249383A JP 13249383 A JP13249383 A JP 13249383A JP S6025037 A JPS6025037 A JP S6025037A
Authority
JP
Japan
Prior art keywords
transfer
medium
magnetic
magnetic recording
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13249383A
Other languages
English (en)
Inventor
Shiro Okamura
岡村　史良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP13249383A priority Critical patent/JPS6025037A/ja
Publication of JPS6025037A publication Critical patent/JPS6025037A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers
    • G11B5/865—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers by contact "printing"
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 この発明は特にレーザ光磁気記録に適した磁気記録再生
装置に関する。
レーザ光磁気記録は高密度記録が可能であるが、再生は
通常ヘッドでは一般に困難である。そこで再生に偏波レ
ーザ光を用いて、カー効果またはファラデー効果による
偏波面の回転を検出し再生出力を得る他はない。しかし
ながら、通常の光磁気記録媒体はキューリー店が低いも
のを用いる関係上、偏波面の回転はｌ　の数分の１程度
しかなく、再生出力のＳ／Ｎは不良である。そこで、ガ
ーネット等に一度記録を転写して、ガーネットの大きい
ファラデー効果を利用して大きい偏波面回転角を得て良
好なＳ／Ｎを得ることが試みられている。しかし、こと
方法はガーネットと磁性媒体の摺動転写による損耗、あ
るいは密着転写後はがして再生に使うなど不便であった
。
この発明は上記の欠点のない転写再生方法を提供する。
第１図は本発明説明図を承け。１は磁気テープ、あるい
はディスク類で、光磁気記録に適するキュー゛リーを持
ち高密度記録さるている。２はガーネット膜なとて必要
に応じ昇温あるいは磁界手段７を用いて、記録を転写す
る。３は再生用レーザで偏光器４を通ったビーム８は２
を照射し、反射ビーム８′は検光器５を経て光電変換素
子６に入る従来の再生装置である、図ではレンズ系は省
略した。この場合２と１とは摺動するので損傷が起り易
い。もし間隙を設けると高域周波数が失われる。
第２図は本発明実施例を示す。ガーネット膜は円筒１３
上に１２の如くつけられ、軸１０を中心としながら転写
される。従フて、摺動部がなく密着転写できる。１７は
第１図７に対応する加熱あ゛るいは磁界手段ど、１に対
すぼ一定位置におく。
１５は消去ヘッドである。円筒１３の矢印の如き回転に
応じレーザ３とビーム８は反射されて８′となり、光電
変換器６に大きいＳ／Ｎの出力を与える。
第２図のような再生装置はカーネッ！・膜や磁性媒体の
損傷を最低に押えることができることは明らかである。
ガーネット膜は円筒上に限らず、エンドレスベルト上に
生成してもよい。円筒やベルト状体上に周知の拡散蒸着
法その他によって生成できる。エンドレスベルトの場合
はベルトの曲りが繰返えされるので、ガーネット膜は余
り厚く着けられない。
本発明は上記特定例に限らず種々の変形が可能である。
【図面の簡単な説明】
第１図は従来の磁気記録再生装置を示す。第２図は本発
明による磁気記録再生装置を示す。

Claims (1)

    【特許請求の範囲】
  1. 磁性記録媒体と、該記録媒体の記録を転写するよう配置
    されたエンドレス状転写媒体と、該転写媒体に光ビーム
    を当てる手段と、該光ビームの反射光における偏波面の
    回転を検出する手段とを備えた磁気記録再生装置。
JP13249383A 1983-07-20 1983-07-20 磁気記録再生装置 Pending JPS6025037A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13249383A JPS6025037A (ja) 1983-07-20 1983-07-20 磁気記録再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13249383A JPS6025037A (ja) 1983-07-20 1983-07-20 磁気記録再生装置

Publications (1)

Publication Number Publication Date
JPS6025037A true JPS6025037A (ja) 1985-02-07

Family

ID=15082659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13249383A Pending JPS6025037A (ja) 1983-07-20 1983-07-20 磁気記録再生装置

Country Status (1)

Country Link
JP (1) JPS6025037A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1031976A2 (en) * 1999-02-25 2000-08-30 Sharp Kabushiki Kaisha Magneto-optical head and magneto-optical device and magneto-optical recording/reproducing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1031976A2 (en) * 1999-02-25 2000-08-30 Sharp Kabushiki Kaisha Magneto-optical head and magneto-optical device and magneto-optical recording/reproducing method
EP1031976A3 (en) * 1999-02-25 2001-07-18 Sharp Kabushiki Kaisha Magneto-optical head and magneto-optical device and magneto-optical recording/reproducing method

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